create data folder if doesn't exist.

NzbDrone.Common/EnvironmentInfo/AppFolderInfo.cs

@@ -20,7 +20,7 @@ namespace NzbDrone.Common.EnvironmentInfo
         private readonly Environment.SpecialFolder DATA_SPECIAL_FOLDER = Environment.SpecialFolder.CommonApplicationData;
 
 
-        public AppFolderInfo (IDiskProvider diskProvider)
+        public AppFolderInfo(IDiskProvider diskProvider)
         {
             _diskProvider = diskProvider;
 
@@ -31,10 +31,12 @@ namespace NzbDrone.Common.EnvironmentInfo
 
             _logger = LogManager.GetCurrentClassLogger();
 
-            AppDataFolder = Path.Combine(Environment.GetFolderPath(DATA_SPECIAL_FOLDER, Environment.SpecialFolderOption.DoNotVerify), "NzbDrone");
+            AppDataFolder = Path.Combine(Environment.GetFolderPath(DATA_SPECIAL_FOLDER, Environment.SpecialFolderOption.Create), "NzbDrone");
             StartUpFolder = new FileInfo(Assembly.GetExecutingAssembly().Location).Directory.FullName;
             TempFolder = Path.GetTempPath();
 
+            diskProvider.EnsureFolder(AppDataFolder);
+
             if (!OsInfo.IsLinux)
             {
                 SetPermissions();

NzbDrone.Core/Datastore/Migration/Framework/SQLiteMigrationHelper.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Data.SQLite;
 using System.Linq;
 using System.Text.RegularExpressions;
+using NLog;
 
 namespace NzbDrone.Core.Datastore.Migration.Framework
 {
@@ -24,11 +25,20 @@ namespace NzbDrone.Core.Datastore.Migration.Framework
         private static readonly Regex SchemaRegex = new Regex(@"['\""\[](?<name>\w+)['\""\]]\s(?<schema>[\w-\s]+)",
             RegexOptions.Compiled | RegexOptions.IgnoreCase | RegexOptions.Multiline);
 
-        public SQLiteMigrationHelper(IConnectionStringFactory connectionStringFactory)
+        public SQLiteMigrationHelper(IConnectionStringFactory connectionStringFactory,Logger logger)
+        {
+            try
             {
                 _connection = new SQLiteConnection(connectionStringFactory.MainDbConnectionString);
                 _connection.Open();
             }
+            catch (Exception e)
+            {
+                logger.ErrorException("Couldn't open databse " + connectionStringFactory.MainDbConnectionString, e);
+                throw;
+            }
+
+        }
 
         private string GetOriginalSql(string tableName)
         {